"Window already focused, ignoring focus gain", when attempting to launch install apk intent

I attempted to launch an install intent as shown in the following example

https://stackoverflow.com/a/5338066/10833862

Device is running Android M (SDK 23)

There is no install screen opening. The following is observed in logcat

1667-2011/system_process I/ActivityManager: START u0 {act=android.intent.action.VIEW dat=file:///storage/emulated/0/app-debug.apk typ=application/vnd.android.package-archive flg=0x10000000 cmp=com.android.packageinstaller/.PackageInstallerActivity} from uid 10061 on display 
1275-2074/? D/gralloc_ranchu: gralloc_alloc: Creating ashmem region of size 708608
1667-2805/system_process W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@e17992c attribute=null, token = android.os.BinderProxy@d7f2315

I don't understand what the logcat is indicating. Please help